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LM LMA LM 3-Amp Adjustable Regulators. General Description. The LM series of adjustable 3-terminal positive voltage regulators is capable of. Nov 11, The LM is an adjustable 3-terminal positive voltage regulator capable of supplying in excess of A over an output voltage range of V to. The LM is an adjustable 3-terminal positive voltage regulator capable of supplying in excess of A over an output voltage range of V to 33V. 1. Adj 2.

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We can set the output voltage with only two external resistors. An optional output capacitor can be added to improve transient response.

Last update 6 January A programmable output regulator. We use only 2 resistors to control the output voltage.

The LM voltage regulators can provide up to 1. Since it has dayasheet current over 3A, we must mount the LM on the large heatsink. A precision current regulator.

Plan to be about 3V about the desired output voltage. The dropout voltage of the IC regulator is about 1. Please update your bookmarks. This is an LM Datasheet. No protection diodes are required for output voltages of less than 25V or greater than 10 uF capacitance. Normally, no capacitors are needed unless the datqsheet is situated more than mm 6 inches from the input filter capacitors in which case an input bypass capacitor is xatasheet.


For example A simple adjustable switching regulator.

National Semiconductor – datasheet pdf

Although the surge is very short in duration, there is enough energy to damage parts of the regulator IC. The LM may be boring for you. This site uses Akismet to reduce spam. Many electronics circuits and datashet for learning in simple ways.

Quote and Order boards in minutes on https: Even small capacitors can have a low enough internal series resistance to be able to deliver 20A spikes when shorted.

See the list below you may like it. Also, its pin output connects the heatsink surface. We have many ways to make it. Basic to use LM We love it because easy to use. Because you like many circuits to make on your working.

In addition, it uses internal current limiting, thermal shutdown, and safe mode. Created 28 July If you want to try it. However, other values such as or ohms can also be used for R 1. Solid tantalum capacitors can be used on the voltage output to improve the ripple rejection of the voltage regulator. Learn how your comment data is processed. You can buy at mouser. See the voltage regulator datasheets above for specific details regarding the dropout voltage and heatsink requirements.


The adjustment terminal of the regulator can be bypassed to achieve very high ripple rejection. With connecting a fixed resistor between the adjust and output.

LM Datasheet(PDF) – Motorola, Inc

As in the LM pinout above. You see LM circuit below. You don’t want to use too high an input voltage as datashwet excess will need to be dissipated as heat through the regulator.

When external capacitors are used with a voltage regulator it may be necessary to use protection diodes to prevent the capacitors from discharging through low current points into the voltage regulator.

National Semiconductor

Where greater output current is required, the LM series regulators are suitable up to 3A and the LM series voltage regulators for up to 5A of output. Which it looks like a popular LM Leave a Reply Cancel reply. It looks much like the popular LM